Dynamic Charging Current Control for Battery Lifespan
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Solution Overview
Problem
Conventional electronic devices charge secondary batteries with a fixed current, leading to rapid deterioration due to excessive charging current, even when ample time is available for charging.
Innovation Solution
An electronic device with a control system that adjusts the charging current based on available time, using a measurement section to track charge accumulation, a time information acquisition section to gather usage data, and a control section to estimate chargeable time and set a restricted charging current to minimize battery deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a large charging current is used, then the charging time is reduced, but the secondary battery deteriorates rapidly
Solution Approach 1:
The charging current is made dynamic rather than fixed. The control section adjusts the charging current based on the estimated chargeable time and amount of charge, switching between normal charging current and restricted charging current to optimize both charging speed and battery lifespan
Solution Approach 2:
The charging current parameter is changed based on charging conditions. The system calculates a restricted charging current that is lower than the normal charging current when chargeable time is sufficient, thereby reducing battery deterioration while still completing charging within the available time period
2Device complexity
If a fixed charging current is used, then the charging control is simple, but the secondary battery deteriorates due to excessive current even when time is available
Solution Approach 1:
The electronic device performs self-diagnosis and self-adjustment of charging current. The control section automatically estimates chargeable time based on charging history information and time information, then autonomously determines the appropriate charging current without requiring external intervention or complex user input
Solution Approach 2:
The system uses feedback from charging history information to adjust charging current. By analyzing past charging patterns and available time periods, the control section learns optimal charging parameters and applies them to subsequent charging cycles, balancing simplicity with battery protection
Data Source
AI summary
Provided is an electronic device including a secondary battery, a charging section which charges the secondary battery with power supplied from an external power supply section with a set charging current, a measurement section which measures an amount of charge accumulated in the secondary battery, a time information acquisition section which acquires time information, a storage section which stores charging history information indicating a time period in which a user performs charging, and a control section which has a chargeable time estimation section that estimates chargeable time based on the charging history information and the time information, and a charging current setting section that calculates a restricted charging current which enables the secondary battery to be charged up to a charging capacity within the chargeable time, based on the amount of charge acquired from the measurement section, and sets the restricted charging current in the charging section.